Malicious PDF — malware analysis report

Static analysis result for SHA-256 3b41d061bcb099f8…

MALICIOUS

PDF

82.7 KB Created: 2021-03-16 16:45:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 127470a13f910f3d3614d41e2928e13a SHA-1: 9a843c46dc7ddea3c6ad4a0f18cb8f4341d7b49b SHA-256: 3b41d061bcb099f89f9ce85850b0525e90cc43e1410df54f226a5584ac789561
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains an embedded URI pointing to a suspicious domain, vilenefex.ru, which is likely part of a phishing or malware distribution scheme. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to trick users into visiting malicious sites, likely for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://vilenefex.ru/award?keyword=antimicrobial+stewardship+pdf PDF link annotation
    • http://redita.fun/black_and_decker_mouse_sander_polisher_ms500_manual8qdhz.pdfIn PDF document text
    • http://help-service-support.com/wisilisstrdz.pdfIn PDF document text
    • http://skidki-day.shop/how_to_make_a_cheap_fog_makerb3h6c.pdfIn PDF document text
    • http://lnstgramhelpcopyright.com/58887235016o17hq.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/bda6b787-0845-4112-97b3-a6e34f3093b7/directv_hr44_vs_hr54.pdfIn PDF document text
    • https://s3.amazonaws.com/nisoxow/kuwefidaburoromovekekugo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/253afbc0-0b70-40f2-8d95-77d76bc3636c/25152216465.pdfIn PDF document text
    • https://s3.amazonaws.com/wewuxuviwar/36002514353.pdfIn PDF document text
    • https://s3.amazonaws.com/baxadelefofibuz/xikawexoxexu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/819989f9-6df7-47fc-9f1d-f5b9f135a67a/pride_and_prejudice_2005_watch_online_123.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/af226462-bf8a-43a2-80c4-7e5176a923eb/how_to_reset_honeywell_chronotherm_iv_plus_thermostat.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/64a43870-4738-42b8-b66c-2977774281eb/are_brioche_burger_buns_sweet.pdfIn PDF document text
    • https://s3.amazonaws.com/sesafefanulokam/86310316841.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0afad6dc-790a-434a-b6a8-04b1fb936bb8/what_is_system_development_life_cycle.pdfIn PDF document text
    • https://s3.amazonaws.com/fejatepudopito/39185800474.pdfIn PDF document text
    • https://s3.amazonaws.com/xoxaneral/fajimowovodezuf.pdfIn PDF document text
    • https://s3.amazonaws.com/dosipive/los_tucanes_de_tijuana_discografia_descargar_mega.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7cb21a76-7964-4b9f-895f-b842cca81498/bright_line_eating_meals_on_the_go.pdfIn PDF document text
    • https://s3.amazonaws.com/zexozavo/sat_subject_test_dates_international_2020-21.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010421.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10421 5616 bytes
SHA-256: e4d2b2fa270bbf05c8af72afefa201610e0313f907a6b6e90fe39529b5128e69
font_01_sfnt_off0001171c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1171C 11496 bytes
SHA-256: 8ca4f8b33e18cdfa587cc4742384c4390f8f17ee9ef78305ce26fff81587e062

Open this report in the interactive analyzer, or submit your own file for analysis.